Question

Which type of white blood cells are connected with the release of histamine and the natural anticoagulant heparin ?
A. Eosinophils
B. Monocytes
C. Neutrophils
D. Basophils

Answer 1

Hint: The types of WBC are Monocyte, Lymphocyte, Neutrophil and Eosinophil. Histamine is released from the body when there is an inflammatory reaction. The cells released are stained blue in h&e staining and have 2 or 3 lobules in S or Headphone shape.

Complete Answer:
- Blood is the most commonly used body fluid by most of the higher organisms including humans. It is a special connective tissue consisting of a fluid matrix plasma and formed elements. Formed elements are Red blood cells White blood cells and platelets. Red blood cells are most abundant. And white blood cells are less in numbers as compared to red blood cells or platelets.
- White blood cells are also known as leukocytes. White blood cells are colourless due to lack of haemoglobin.
- White blood cells are nucleated and are relatively lesser in number which averages 6000 to 8000 per millimetre cube of blood.
- White blood cells are generally short lived. In humans two main categories of white blood cells are granulocytes and agranulocytes are present. Granulocytes of different types suggest neutrophils, eosinophils and basophils. Agranulocytes consist of lymphocytes and monocytes.
- Neutrophils are the most abundant in white blood cells. Whereas basophils are the least abundant in white blood cells. Neutrophils and monocytes are phagocytic cells which are used to destroy foreign organisms entering the body, basophils secrete histamine and natural anticoagulant heparin. Basophils also secretes serotonin and are involved in inflammatory reactions.
- Eosinophils resist infections and are also associated with allergic reactions.
- Lymphocytes are of two major types B lymphocytes and T lymphocytes. Lymphocytes responsible for the immune response of the body.

So the correct answer is (D).

Note: If the number of white blood cells are more than normal values this indicates leukemia, which is a type of cancer also known as blood cancer.